Testing device for oil wells



C. R. EDWARDS l TESTING DEVICE FOR OIL WELLS Nov. 4 1924.

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CHARLES R. EDWARDS, GF HOUSTON, TEXAS.

v'.'LIEIS'JI'ING DEVICE :FOR OIL WELLS.

Application med January 17, 1921. serial No. 437,972.

To all whom t may concer/n:

Be it known that I, CHARLES R.' EDWARDS, a citizen of the United States, -residinnr at Houston, in the county of Harris and tate of Texas, have invented certain new and useful Improvements in a Testing Device for Oil l/Vells, of which the following is a specification.

This invention relates to new and useful improvements in a testing device for oil wells.

One object of the invention is to provide a device of the character described which is specially adapted for. testing the strata, being pierced, in drilling oil, gas or other wells, for the purpose of determining the presence or absence of oil, gas or other fluids.

With the above andy other objects in view the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings, wherein Figure 1 is a side elevation of the device, and

Figure 2 is a side elevation, partially in section, showing the well packer set.

Referring now more particularly to the drawings, the numeral l refers to a pipe, usually the ordinary drill stem which is let down into the bore as drilling progresses. The upper end of the pipe carries the casing'head 2, having the hose connection 3, through which' water or slush is .forced into the interior of the pipe by means of the ordinary' slush pump the purpose.

Threaded onto the lower end of the pipe there is a nipple 4 to which the packer 5 is attached. This'packer isk provided to separate any stratum that may be encountered from any other stratum to be tested. This packer is of the usual construction,` well known to those familiar withl the art of drilling wells.

The nipple 4 has a seatv6 and depending therefrom there is a surrounding sleeve 7 whose lower end has internal threads.

A stem `8 is ,fitted through the casing head 2 and the sleeve 7 fits over'the lower end of this stem and is threaded thereon. The lower end of the stem is closed and preferably pointed and the section thereof within the sleeve 7 lis perforated The upper commonly used for end of the sleeve is formed with a-stuling box 9 through which the stem Hts and which forms a water tight joint therewith.

In drilling, water,iladen with mud, is forced under pressure of the pump, down into the bore to carry away the cuttings from the drill. This operation makes it difficult to test the strata for oil with the ordinary drilling equipment. With my apparatus, when it is desired to make 'a test, .the drill pipe with the nipple 4 and Athe perforated lower end attached to the packer is lowered to near the bottom of the well; then the test stem 8, together with the sleeve 7, is seat 6 and water is then pumped down through the casing head 2 to wash out the bottom of the well by forcing water down the inside of the pipe 1 past the test stem 8 and the seat 6, to below the packer, thoroughly washing the stratum to be tested. The packer is then raised, tripped and set. The test stem is seated on the seat 6 and the slush pump started pumping in mud down the pipe l, out through its perforated lower v as to maintain the wall. as to let the water settle away and oil, gas or other fluid to accumulate, the test stem is screwed to the" right, thus unscrewing it from the vsleeve 7 and the test stem 8 is lowered. If there be any pressure of oil, gas or otherl fluid it will now rush through the perforated section of the stem 8, and up vthestem and if there be sufficient ressure of the oil, gas or other fluid from t e stratum below |the packer, it will push a stream of the same from the top of said stem. By placing an ordinary working barrel at any suitable point in the test stem 8, if the pressure of the oil, or other fluid should not be great, the pump in the workingbarrel can be started and the fluid forced out through the stem 8, thus completely testing the stratuml under investigation, both as to quality and quantity of flow of the fluid, and if oil or gas under enormous pressure is encountered, the superpressure may be relieved before attemptend and up so After a time so ring to set regular casing.v

To withdraw the apparatus the packer is lirst released before stopping the slush pump and the test stem is then Withdrawn before withdrawing the drill pipe and packer.

What I claim is rs l, The combination with a packer adaptlowered to a point above the' ed to be set in a well bore, of a stem provided to be inserted through said packer and adapted to communicate with the bore beneath said packer and permit fluid to be forced from the stratum, below said p-acker.

2. The combination with a packer adapted to be set in a well bore, of a tubular stem fitted through said packer, and normally blocking the same against the passage of fluid therethrough, the lower end of the stem being provided with an inlet through which the stem communicates with the bore beneath the packer when the stem is lowered through said packer.

3. The combination with a casing whose lower end is perforated, of a packer attached to the lower end thereof, and adapted to be set in a well bore, a stem tted through the packer and at all times closing the packer against the flow of fluid from the casing downwardly therethrough, said stem, while in one position, excluding the flow of fluid therethrough from the bore beneath the packing and while in another position permitting fluid to fiow from beneath the packer upwardly therethrough.

4. The combination witha casing whose lower end is perforated, of a packer attached to the lower end thereof, a sleeve within the packer, a stem within the casing whose lower end is' fitted through the sleeve, the lower end of thestem being closed and the section thereof within the packer being perforated.

5. The combination with a packer adapted to be set in a well bore and having an internal fluid passageway, of a stem adapted to be inserted into said passageway to block the same, said stem being adapted to be lowered through the packer, and when in lowered position communicating with the bore 4beneath the packer and adapted to permit the forcing of fluid through said stem from the strata, below said packer.

6. The combination with a packer adapted to be set in a. well bore, of a tubular stem fitted through said packer and normally blocking the same against the passage of fluid therethrough, the lower end of said stem being provided with an yinlet which is closed when the stem is in said blocking position, said stem being capable of being lowered beneath the packer and when in lowered position to communicate through said inlet with the bore'beneath the packer.

In testimony` whereof I have signed my name to this specification in the presence of two subscribin witnesses.

CHA LES R. EDWARDS.

Witnesses:

Riti. SMITH, WM. A. CATHEY.

DISCLAIMER ,1,514,585r-Uharles R. Edwards, Houston, Tex. vTEs'rrNe DEVICE roR'Orn WELLS. i Patent dated November 4, 1924. Disclaimer filed July 3,1930, by the patentes; Hereby enters this disclaimer to so much of claim 1 of said patent as is in excess of the following:

In an apparatus for testing the productivity of a stratum exposed ina well while containing drilling uid which might substantially prevent a-iiow from said stratum, thecombination with a packer adapted to be set in a well bore, of a stem provided to beinserted through said packer and adapted to communicate with the bore beneath said packer to relieve pressure of said iuid againstfsaid exposed stratum and permit fluid to be forced from the stratum, below said packer.

Your petitioner also hereby enters this disclaimer to so much of claim 5 of said patent as is in excess of the following:

In an apparatus for testing the productivity of a stratum exposed in a well while containing drilling fluid which might substantially prevent a flow from said stratum, the combination with a packer adapted to be set in a well bore and having an internal fiuid passageway, of a stem adapted to be inserted into said passageway to block the same, said stem being adapted to be lowered through the packer, and when in lowered position communicating with the bore beneath the packer and adapted to permit the forcing of fluid through said stem from the strata, below said packer.

Your petitioner also hereby enters this disclaimerto so `much of claim 6 of said patent as is in excess of the following:

In an apparatus for testing the productivity of a stratum exposed in a well' while containing drilling :duid which might substantially prevent a flow from -said stratum, the combmation'with a packeradapted to be set in a well bore, of a tubular stem fitted through said packer and normally blocking the same against the passage of fluid therethrough, the lower end of said stem being provided with an inlet which is closed when the stem is in said blocln'ng position, said stem being' capable of being lowered beneath the packer and when in lowered position to communicate through said inlet with the bore beneath the packer.

[Oficial Gazette July 22, 1930] DISCLAH M ER 1,514,585.-Charles R. Edwards,

Houston, Tex. TESTING DEV Patent dated November 4, 1924, Disclaimer filed March 8, Hereby enters this disclaimer 10E FOR OIL WELLS.

1932, by the patentee. as follows: He, said patenlsee, disclaims an y interpreoat inthe patent whlch does not res 

